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2,2-DIMETHYL-4,5-BENZOSPIRO(2,4)HEPTANE-AND 2,2-DIMETHYL-4,5-BENZOSPIRO(2,4)HEPTA-4,6-DIENE-1-CARBOXYLATES COMPOUNDS,AND THEIR USED AS INSECTICIDE
2,2-DIMETHYL-4,5-BENZOSPIRO(2,4)HEPTANE-AND 2,2-DIMETHYL-4,5-BENZOSPIRO(2,4)HEPTA-4,6-DIENE-1-CARBOXYLATES COMPOUNDS,AND THEIR USED AS INSECTICIDE